Qubes OS

Qubes OS is a security-oriented operating system that allows you to compartmentalize your data and activities into isolated environments called "qubes" so that a single cyberattack can't take down your entire digital life in one fell swoop.

Website: https://www.qubes-os.org/
Downloads: https://www.qubes-os.org/downloads/
Donate: https://www.qubes-os.org/donate/
Help & Support: https://www.qubes-os.org/support/